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Home >> GMC >> 1998 >> Suburban K2500, 6.5 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Engine Control System & Component Tests - 4.3L) >> Miscellaneous Pcm/VCM Controls >> A/C Compressor Clutch Controls

A/C Compressor Clutch Controls

WARNING: This page is about a different car, the 1997 GMC Savana, 1997 Chevrolet Chevy Van, and 1997 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The A/C compressor clutch relay is controlled by the PCM. The PCM improves idle quality by delaying A/C compressor clutch engagement until idle speed is increased, or disengages A/C compressor clutch when idle speed is too low. A/C compressor clutch is cycled by PCM. PCM smooths cycling of A/C compressor clutch by adding fuel the instant A/C compressor clutch is applied.

NOTE: See the WIRING DIAGRAMS article for component location, terminal and wire color identification.
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